Partially revert 813a928c7c

Otherwise ASAN complains about mismatched new/delete.

Change-Id: I76ddcc388309e20055c93c68b9b6fa8a11b884e1
Reviewed-by: Andrei Golubev <andrei.golubev@qt.io>
Reviewed-by: Ville Voutilainen <ville.voutilainen@qt.io>

src/corelib/tools/qsharedpointer_impl.h

@@ -152,6 +152,9 @@ namespace QtSharedPointer {
 #endif
         inline void checkQObjectShared(...) { }
         inline void setQObjectShared(...) { }
+
+        inline void operator delete(void *ptr) { ::operator delete(ptr); }
+        inline void operator delete(void *, void *) { }
     };
     // sizeof(ExternalRefCountData) = 12 (32-bit) / 16 (64-bit)